diff --git a/README.md b/README.md
index 1a5af7deb8..59d4570c0e 100644
--- a/README.md
+++ b/README.md
@@ -135,7 +135,7 @@ macOS
 -----
 
 On macOS, you will need to download a set of precompiled thirdparty packages in order to
-compile Panda3D, which can be acquired from [here](https://www.panda3d.org/download/panda3d-1.10.4.1/panda3d-1.10.4.1-tools-mac.tar.gz).
+compile Panda3D, which can be acquired from [here](https://www.panda3d.org/download/panda3d-1.10.5/panda3d-1.10.5-tools-mac.tar.gz).
 
 After placing the thirdparty directory inside the panda3d source directory,
 you may build Panda3D using a command like the following:
diff --git a/direct/src/dist/commands.py b/direct/src/dist/commands.py
index 6a2eafb0c9..4b5749860d 100644
--- a/direct/src/dist/commands.py
+++ b/direct/src/dist/commands.py
@@ -240,6 +240,9 @@ class build_apps(setuptools.Command):
             'macosx_10_6_x86_64',
             'win_amd64',
         ]
+        if sys.version_info >= (3, 8):
+            # This version of Python is only available for 10.9+.
+            self.platforms[1] = 'macosx_10_9_x86_64'
         self.plugins = []
         self.embed_prc_data = True
         self.extra_prc_files = []
diff --git a/direct/src/stdpy/file.py b/direct/src/stdpy/file.py
index 458406a1e0..49896c2109 100644
--- a/direct/src/stdpy/file.py
+++ b/direct/src/stdpy/file.py
@@ -304,6 +304,7 @@ class StreamIOWrapper(io.IOBase):
         self.__stream.clear()  # clear eof flag
         self.__write(b)
         self.__lastWrite = True
+        return len(b)
 
     def writelines(self, lines):
         if not self.__writer:
diff --git a/makepanda/installpanda.py b/makepanda/installpanda.py
index 83e23bac2c..6d99d5ab36 100644
--- a/makepanda/installpanda.py
+++ b/makepanda/installpanda.py
@@ -277,3 +277,8 @@ if (__name__ == "__main__"):
                  outputdir=options.outputdir,
                  python_versions=ReadPythonVersionInfoFile())
     print("Installation finished!")
+
+    if not destdir:
+        warn_prefix = "%sNote:%s " % (GetColor("red"), GetColor())
+        print(warn_prefix + "You may need to call this command to update the library cache:")
+        print("  sudo ldconfig")
diff --git a/makepanda/makepanda.py b/makepanda/makepanda.py
index 49ffcd6962..779402455b 100755
--- a/makepanda/makepanda.py
+++ b/makepanda/makepanda.py
@@ -837,6 +837,7 @@ if (COMPILER=="GCC"):
         PkgDisable("OPENCV")
 
     if GetTarget() == "darwin" and not PkgSkip("OPENAL"):
+        LibName("OPENAL", "-framework AudioUnit")
         LibName("OPENAL", "-framework AudioToolbox")
         LibName("OPENAL", "-framework CoreAudio")
 
@@ -1896,6 +1897,8 @@ def CompileRsrc(target, src, opts):
     ipath = GetListOption(opts, "DIR:")
     if os.path.isfile("/usr/bin/Rez"):
         cmd = "Rez -useDF"
+    elif os.path.isfile("/Library/Developer/CommandLineTools/usr/bin/Rez"):
+        cmd = "/Library/Developer/CommandLineTools/usr/bin/Rez -useDF"
     else:
         cmd = "/Developer/Tools/Rez -useDF"
     cmd += " -o " + BracketNameWithQuotes(target)
diff --git a/makepanda/makepandacore.py b/makepanda/makepandacore.py
index e56d6aa159..c2fbfd203c 100644
--- a/makepanda/makepandacore.py
+++ b/makepanda/makepandacore.py
@@ -1690,18 +1690,20 @@ def SmartPkgEnable(pkg, pkgconfig = None, libs = None, incs = None, defs = None,
             LibName(target_pkg, "-framework " + framework)
             return
 
-        if os.path.isdir(os.path.join(pkg_dir, "include")):
-            IncDirectory(target_pkg, os.path.join(pkg_dir, "include"))
+        inc_dir = os.path.join(pkg_dir, "include")
+        if os.path.isdir(inc_dir):
+            IncDirectory(target_pkg, inc_dir)
 
             # Handle cases like freetype2 where the include dir is a subdir under "include"
             for i in incs:
-                if os.path.isdir(os.path.join(pkg_dir, "include", i)):
-                    IncDirectory(target_pkg, os.path.join(pkg_dir, "include", i))
+                if os.path.isdir(os.path.join(inc_dir, i)):
+                    IncDirectory(target_pkg, os.path.join(inc_dir, i))
 
-        lpath = [os.path.join(pkg_dir, "lib")]
+        lib_dir = os.path.join(pkg_dir, "lib")
+        lpath = [lib_dir]
 
         if not PkgSkip("PYTHON"):
-            py_lib_dir = os.path.join(pkg_dir, "lib", SDK["PYTHONVERSION"])
+            py_lib_dir = os.path.join(lib_dir, SDK["PYTHONVERSION"])
             if os.path.isdir(py_lib_dir):
                 lpath.append(py_lib_dir)
 
@@ -2383,7 +2385,9 @@ def SdkLocateMacOSX(osxtarget = None):
     if (GetHost() != "darwin"): return
     if (osxtarget != None):
         sdkname = "MacOSX%d.%d" % osxtarget
-        if (os.path.exists("/Developer/SDKs/%su.sdk" % sdkname)):
+        if (os.path.exists("/Library/Developer/CommandLineTools/SDKs/%s.sdk" % sdkname)):
+            SDK["MACOSX"] = "/Library/Developer/CommandLineTools/SDKs/%s.sdk" % sdkname
+        elif (os.path.exists("/Developer/SDKs/%su.sdk" % sdkname)):
             SDK["MACOSX"] = "/Developer/SDKs/%su.sdk" % sdkname
         elif (os.path.exists("/Developer/SDKs/%s.sdk" % sdkname)):
             SDK["MACOSX"] = "/Developer/SDKs/%s.sdk" % sdkname
diff --git a/panda/src/device/evdevInputDevice.cxx b/panda/src/device/evdevInputDevice.cxx
index 69d2979f7f..26bb83186e 100644
--- a/panda/src/device/evdevInputDevice.cxx
+++ b/panda/src/device/evdevInputDevice.cxx
@@ -364,7 +364,7 @@ init_device() {
 
   // Try to detect which type of device we have here
   if (_device_class == DeviceClass::unknown) {
-    int device_scores[(size_t)DeviceClass::spatial_mouse] = {0};
+    int device_scores[(size_t)DeviceClass::digitizer + 1] = {0};
 
     // Test for specific keys
     if (test_bit(BTN_GAMEPAD, keys) && test_bit(ABS_X, axes) && test_bit(ABS_RX, axes)) {
@@ -385,6 +385,9 @@ init_device() {
     if (test_bit(BTN_MOUSE, keys) && test_bit(EV_REL, evtypes)) {
       device_scores[(size_t)DeviceClass::mouse] += 20;
     }
+    if (test_bit(BTN_DIGI, keys) && test_bit(EV_ABS, evtypes)) {
+      device_scores[(size_t)DeviceClass::digitizer] += 20;
+    }
     uint8_t unknown_keys[] = {KEY_POWER};
     for (int i = 0; i < 1; i++) {
       if (test_bit(unknown_keys[i], keys)) {
@@ -424,7 +427,7 @@ init_device() {
 
     // Check which device type got the most points
     int highest_score = 0;
-    for (size_t i = 0; i < (size_t)DeviceClass::spatial_mouse; i++) {
+    for (size_t i = 0; i <= (size_t)DeviceClass::digitizer; i++) {
       if (device_scores[i] > highest_score) {
         highest_score = device_scores[i];
         _device_class = (DeviceClass)i;
@@ -619,6 +622,9 @@ init_device() {
             have_analog_triggers = true;
           }
           break;
+        case ABS_PRESSURE:
+          axis = InputDevice::Axis::pressure;
+          break;
         }
 
         // Check the initial value and ranges.
@@ -630,7 +636,8 @@ init_device() {
           // Also T.Flight Hotas X throttle is reversed and can go backwards.
           if (axis == Axis::yaw || axis == Axis::rudder || axis == Axis::left_y || axis == Axis::right_y ||
               (axis == Axis::throttle && (quirks & QB_reversed_throttle) != 0) ||
-              (_device_class == DeviceClass::spatial_mouse && (axis == Axis::y || axis == Axis::z || axis == Axis::roll))) {
+              (_device_class == DeviceClass::spatial_mouse && (axis == Axis::y || axis == Axis::z || axis == Axis::roll)) ||
+              (_device_class == DeviceClass::digitizer && axis == Axis::y)) {
             std::swap(absinfo.maximum, absinfo.minimum);
           }
           if (axis == Axis::throttle && (quirks & QB_centered_throttle) != 0) {
diff --git a/panda/src/device/inputDevice.cxx b/panda/src/device/inputDevice.cxx
index cce2f975b4..71869abc64 100644
--- a/panda/src/device/inputDevice.cxx
+++ b/panda/src/device/inputDevice.cxx
@@ -578,6 +578,9 @@ format_device_class(DeviceClass dc) {
 
   case InputDevice::DeviceClass::spatial_mouse:
     return "spatial_mouse";
+
+  case InputDevice::DeviceClass::digitizer:
+    return "digitizer";
   }
   return "**invalid**";
 }
@@ -644,6 +647,9 @@ format_axis(Axis axis) {
 
   case InputDevice::Axis::brake:
     return "brake";
+
+  case InputDevice::Axis::pressure:
+    return "pressure";
   }
   return "**invalid**";
 }
diff --git a/panda/src/device/inputDevice.h b/panda/src/device/inputDevice.h
index f3f500e378..83038075a8 100644
--- a/panda/src/device/inputDevice.h
+++ b/panda/src/device/inputDevice.h
@@ -80,6 +80,9 @@ PUBLISHED:
 
     // 3D mouse, such as produced by 3Dconnexion.
     spatial_mouse,
+
+    // A graphics tablet with stylus/pen.
+    digitizer,
   };
 
   enum class Feature {
@@ -128,6 +131,9 @@ PUBLISHED:
     wheel,
     accelerator,
     brake,
+
+    // Pen pressure
+    pressure,
   };
 
   enum State {
diff --git a/panda/src/device/phidsdi.h b/panda/src/device/phidsdi.h
index 647b3ed322..5917155b0c 100644
--- a/panda/src/device/phidsdi.h
+++ b/panda/src/device/phidsdi.h
@@ -28,6 +28,7 @@ typedef USHORT USAGE, *PUSAGE;
 #define HID_USAGE_PAGE_KEYBOARD        ((USAGE) 0x07)
 #define HID_USAGE_PAGE_LED             ((USAGE) 0x08)
 #define HID_USAGE_PAGE_BUTTON          ((USAGE) 0x09)
+#define HID_USAGE_PAGE_DIGITIZER       ((USAGE) 0x0d)
 
 #define HID_USAGE_GENERIC_POINTER      ((USAGE) 0x01)
 #define HID_USAGE_GENERIC_MOUSE        ((USAGE) 0x02)
diff --git a/panda/src/device/winInputDeviceManager.cxx b/panda/src/device/winInputDeviceManager.cxx
index 2ca4540ae6..0d2c69f216 100644
--- a/panda/src/device/winInputDeviceManager.cxx
+++ b/panda/src/device/winInputDeviceManager.cxx
@@ -14,6 +14,7 @@
 #include "winInputDeviceManager.h"
 #include "winRawInputDevice.h"
 #include "throw_event.h"
+#include "phidsdi.h"
 
 #if defined(_WIN32) && !defined(CPPPARSER)
 
@@ -385,7 +386,7 @@ setup_message_loop() {
   }
 
   // Now listen for raw input devices using the created message loop.
-  RAWINPUTDEVICE rid[3];
+  RAWINPUTDEVICE rid[4];
   rid[0].usUsagePage = 1;
   rid[0].usUsage = 4; // Joysticks
   rid[0].dwFlags = RIDEV_DEVNOTIFY | RIDEV_INPUTSINK;
@@ -398,7 +399,11 @@ setup_message_loop() {
   rid[2].usUsage = 8; // Multi-axis controllers (including 3D mice)
   rid[2].dwFlags = RIDEV_DEVNOTIFY | RIDEV_INPUTSINK;
   rid[2].hwndTarget = _message_hwnd;
-  if (!RegisterRawInputDevices(rid, 3, sizeof(RAWINPUTDEVICE))) {
+  rid[3].usUsagePage = HID_USAGE_PAGE_DIGITIZER;
+  rid[3].usUsage = 1; // Digitizers
+  rid[3].dwFlags = RIDEV_DEVNOTIFY | RIDEV_INPUTSINK;
+  rid[3].hwndTarget = _message_hwnd;
+  if (!RegisterRawInputDevices(rid, 4, sizeof(RAWINPUTDEVICE))) {
     device_cat.warning()
       << "Failed to register raw input devices.\n";
   }
diff --git a/panda/src/device/winRawInputDevice.cxx b/panda/src/device/winRawInputDevice.cxx
index 10262d124c..843e434a16 100644
--- a/panda/src/device/winRawInputDevice.cxx
+++ b/panda/src/device/winRawInputDevice.cxx
@@ -199,6 +199,11 @@ on_arrival(HANDLE handle, const RID_DEVICE_INFO &info, std::string name) {
                info.hid.usUsage == HID_USAGE_GENERIC_KEYBOARD) {
       _device_class = DeviceClass::keyboard;
 
+    // Digitizers
+    } else if (info.hid.usUsagePage == HID_USAGE_PAGE_DIGITIZER &&
+               info.hid.usUsage == 1) {
+      _device_class = DeviceClass::digitizer;
+
     // 3Dconnexion SpaceNavigator and friends.
     } else if (_vendor_id == 0x046d &&
         (_product_id == 0xc623 ||
@@ -504,6 +509,14 @@ on_arrival(HANDLE handle, const RID_DEVICE_INFO &info, std::string name) {
           continue;
         }
         break;
+
+      case HID_USAGE_PAGE_DIGITIZER:
+        switch (usage) {
+        case 0x30:
+          axis = Axis::pressure;
+          break;
+        }
+        break;
       }
 
       // If this axis already exists, don't double-map it, but take the first